ANSWER:
[tex]x\le18.05[/tex]STEP-BY-STEP EXPLANATION:
We have that the equation that describes the problem is built from the gift card, because it is the maximum limit that Danielle can spend and the giftcard has already spent a total of 11.95 therefore:
[tex]\begin{gathered} 30-11.95=18.05 \\ \text{therefore:} \\ x\le18.05 \end{gathered}[/tex]